A square lithium battery vertical edge appearance defect detection device and defect detection method

Abstract

A device for detecting vertical side appearance defects of a square lithium battery comprises: a support plate group, comprising a first support plate and a second support plate; a linear module, mounted between the first support plate and the second support plate, for driving the vertical side detection assembly to slide axially along the linear module; a vertical side appearance defect detection device, arranged on the Y-direction slider of the linear module, for detecting whether the vertical side appearance of the square lithium battery has defects; a battery base assembly, arranged between the first support plate and the second support plate, for clamping the square lithium battery; and a turntable assembly, arranged on the upper and lower surfaces of the support plate, for horizontally rotating the square lithium battery 180°; the present invention also comprises a defect detection method, comprising the following steps: fixing the square lithium battery by a battery clamp assembly, and photographing and scanning the two vertical side defects of the square lithium battery by the action of the linear module and the turntable assembly. The beneficial effect of the present invention is: automatically detecting vertical side defects of lithium batteries.

Description

Technical Field

[0001] The invention relates to a device and a method for detecting appearance defects of vertical edges of square lithium batteries, belonging to the technical field of lithium battery detection. Background Art

[0002] At present, the country vigorously promotes new energy vehicles, and the lithium battery industry has also developed greatly. Under this circumstance, the requirements for the appearance inspection of lithium battery finished products will become more and more stringent. Lithium batteries are mainly divided into soft packs, cylindrical and square according to their shapes, and the square lithium batteries are aluminum shells. During the production process, the aluminum shell is easily bruised and scratched, and after leaving the warehouse and before the coating process, the appearance defects of square lithium batteries need to be inspected with high precision. The appearance defect inspection of square lithium batteries mainly includes large surface appearance defect inspection, small surface appearance defect inspection and vertical edge appearance defect inspection, and the vertical edge appearance defect inspection technology is relatively difficult and not easy to achieve. Summary of the invention

[0003] In order to solve the problem of vertical edge appearance defect detection, the present invention proposes a square lithium battery vertical edge appearance defect detection device. The weighing device has the advantages of simple structure, high defect detection accuracy, strong compatibility, etc. In addition, it can be directly and quickly connected to the existing production line to improve the working efficiency of the production line.

[0004] The device for detecting vertical side appearance defects of a square lithium battery according to the present invention is characterized by comprising:

[0005] A support plate group, comprising a first support plate and a second support plate, wherein the first support plate and the second support plate are arranged side by side at the same height;

[0006] A linear module is mounted between the first support plate and the second support plate, and the axial direction of the linear module is in the Y direction, comprising a Y-guide rail assembly and a Y-direction slider, the two ends of the Y-guide rail assembly are respectively mounted on the first support plate and the second support plate, and the Y-guide rail assembly has a built-in Y-direction driving device; the Y-direction slider is slidably mounted on the Y-guide rail, and the Y-direction slider is connected to the Y-direction driving device, and is used to drive the vertical edge detection assembly to slide along the axial direction of the linear module;

[0007] A vertical edge appearance defect detection device is arranged on the Y-direction slider of the linear module, and comprises a vertical edge sliding plate, a horizontal driving component and a detection camera component. The vertical edge sliding plate is installed on the Y-direction slider of the linear module; the bottom of the horizontal driving component is slidably installed on the X-direction guide rail of the vertical edge sliding plate, and the upper part of the horizontal driving component is installed with a detection camera component for detecting whether the vertical edge appearance of the square lithium battery has defects;

[0008] A battery base assembly is arranged between the first support plate and the second support plate, and comprises a support column, a support plate, a support rib plate and a battery clamp assembly. The support plate is mounted between the first support plate and the second support plate through the support column, and is located on one side of the linear module, and is used to install the battery clamp assembly; the support rib plate is installed on the outer side of the support plate, and is used to support the support plate; the battery clamp assembly is installed on the support plate, and is used to clamp the square lithium battery;

[0009] And a turntable assembly, which is arranged on the upper and lower surfaces of the support plate, includes a reducer, a rotating wheel, a mounting shaft, a rotating shaft and a large-surface suction cup, wherein the reducer is mounted on the lower surface of the support plate through a base, and the front end of the reducer is connected to the rotating wheel; the rotating wheel is divided into two groups, and the two groups of rotating wheels are respectively connected by a first synchronous belt, a second synchronous belt and the corresponding mounting shaft belt, and the large-surface suction cup is installed on the top of the mounting shaft, and the adsorption surface of the large-surface suction cup is aligned with the large surface of the square lithium battery, so as to adjust the square lithium battery by 180°

[0010] Horizontal rotation.

[0011] The horizontal drive assembly includes an X-guide rail, a slider, a vertical pad and a cylinder. The X-guide rail is divided into two groups, which are parallel to each other and horizontally laid on the surface of the vertical sliding plate. The X-guide rail is arranged in the horizontal direction perpendicular to the axial direction of the linear module; the slider is divided into two groups, and each group of sliders is slidably installed on a corresponding group of X-guide rails; the vertical pad is installed above each group of sliders; the cylinder is installed on the vertical sliding plate and is located between the X-guide rails. The telescopic end of the cylinder is connected to the slider for driving the slider to slide axially along the X-guide rail.

[0012] Furthermore, the detection camera assembly includes a camera mounting horizontal plate, a camera mounting vertical plate, reinforcing ribs, a camera support plate, a camera protection bracket and a camera, wherein the camera mounting horizontal plate is mounted on the vertical edge pad; the camera mounting vertical plate is mounted on the camera mounting horizontal plate; the reinforcing ribs are arranged between the camera mounting horizontal plate and the camera mounting vertical plate; there are two groups of camera support plates, which are installed and connected to the outer side of the camera mounting vertical plate, and the camera is installed thereon; there are two groups of camera protection brackets, which are arranged above the camera to protect the camera.

[0013] Furthermore, the upper surface of the large-surface suction cup is in a "concave" shape, a large-surface buffer pad is provided in the middle of the "concave" shape, and four suction cups are provided at both ends of the "concave" shape. The large-surface suction cup and the large-surface buffer pad are used to support the large surface of the square lithium battery.

[0014] Furthermore, the battery clamp assembly is an L-shaped structure, which is installed and connected to the clamping cylinder through a slider. The battery clamp assembly has two groups, which are respectively installed on the support plate, including a battery clamp, a clamping cylinder, a battery base plate and a nylon baffle. The battery clamp is an L-shaped structure, and the battery clamps are a group of two. The battery clamp is installed and connected to the clamping cylinder through a connecting slider. The clamping cylinder is installed on the battery base plate. The battery base plate is installed and connected to the outside of the support plate and the support rib plate. There are four nylon baffles, which are arranged at the horizontal end of the L-shaped structure to clamp the square lithium battery.

[0015] Furthermore, it also includes a control device, the signal output end of the control device is electrically connected to the control ends of the Y-axis drive device, the clamping cylinder and the reducer respectively, and the data input end of the control device is electrically connected or signal-connected to the signal input end of the camera.

[0016] The defect detection method using the square lithium battery vertical edge appearance defect detection device of the present invention is characterized by comprising the following steps:

[0017] (1) The square lithium battery is loaded to the middle position between the large-surface suction cup and the large-surface buffer pad by a loading robot, and both ends of the square lithium battery are fixed by the battery clamp assembly;

[0018] (2) After the square lithium battery is in place, the vertical edge detection component moves in the Y direction through the action of the linear module, and then uses the camera to take pictures and scan the defects of the two vertical edges of the square lithium battery;

[0019] (3) After the two vertical edges are inspected, the square lithium battery is flipped 180° under the action of the turntable assembly, and then the other two vertical edges of the square lithium battery are photographed and scanned by a camera;

[0020] (4) When the square lithium battery is changed to a new model, the distance between the camera of the vertical edge detection component and the square lithium battery is adjusted to be compatible with the appearance defect detection of square lithium batteries of different models.

[0021] The beneficial effects of the present invention are as follows: a device for detecting appearance defects on vertical edges of square lithium batteries is proposed. The weighing device has the advantages of simple structure, high defect detection accuracy, strong compatibility, etc. In addition, it can be directly and quickly connected to the existing production line to improve the working efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the present invention;

[0023] Figure 2 is a top view of the present invention;

[0024] Figure 3 is a front view of the present invention;

[0025] Figure 4 It is a left side view of the present invention;

[0026] Figure 5 is a structural diagram of a vertical edge detection assembly of the present invention;

[0027] Figure 6 It is one of the structural diagrams of the battery base assembly and the turntable assembly of the present invention;

[0028] Figure 7 This is the second structural diagram of the battery base assembly and the turntable assembly of the present invention;

[0029] Figure 8 is a front view of the battery base assembly and the turntable assembly of the present invention;

[0030] Fig. 9 It is a left side view of the battery base assembly and the turntable assembly of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings.

[0032] Refer to the attached figure:

[0033] The present invention provides a device for detecting vertical side appearance defects of a square lithium battery, comprising:

[0034] A support plate group, including a first support plate 11 and a second support plate 12, wherein the first support plate 11 and the second support plate 12 are arranged side by side at the same height, and are used to support the linear module 2 and the battery base assembly 4;

[0035] The linear module 2 is mounted between the first support plate 11 and the second support plate 12, and the axial direction of the linear module 2 is in the Y direction, comprising a Y-guide rail assembly and a Y-direction slider, the two ends of the Y-guide rail assembly are respectively mounted on the first support plate and the second support plate, and the Y-guide rail assembly has a built-in Y-direction driving device; the Y-direction slider is slidably mounted on the Y-guide rail, and the Y-direction slider is connected to the Y-direction driving device, and is used to drive the vertical edge detection assembly to slide along the axial direction (i.e., the Y direction) of the linear module;

[0036] The vertical edge appearance defect detection device 3 is arranged on the Y-direction slider of the linear module 2, and comprises a vertical edge sliding plate 31, a horizontal driving component and a detection camera component. The vertical edge sliding plate is installed on the Y-direction slider of the linear module; the bottom of the horizontal driving component is slidably installed on the X-direction guide rail of the vertical edge sliding plate, and the upper part of the horizontal driving component is installed with a detection camera component for detecting whether the vertical edge appearance of the square lithium battery has defects;

[0037] The battery base assembly 4 is arranged between the first support plate 11 and the second support plate 12, and includes a support column 41, a support plate 42, a support rib plate 43 and a battery clamp assembly 44. The support plate 42 is mounted between the first support plate 11 and the second support plate 12 through the support column 41, and is located on one side of the linear module 2, and is used to install the battery clamp assembly; the support rib plate 43 is installed on the outer side of the support plate 42, and is used to support the support plate 42; the battery clamp assembly 44 is installed on the support plate, and is used to clamp the square lithium battery;

[0038] And a turntable assembly 5, which is arranged on the upper and lower surfaces of the support plate 42, includes a reducer 51, a rotating wheel 54, a mounting shaft 55 and a large-surface suction cup 56. The reducer 51 is installed on the lower surface of the support plate 42 through a base, and the front end of the reducer 51 is connected to the rotating wheel 54; the rotating wheel 54 is divided into two groups, and the two groups of the rotating wheels 54 are respectively connected by a first synchronous belt 52, a second synchronous belt 53 and the corresponding mounting shaft 55 belts, and the large-surface suction cup 56 is installed on the top of the mounting shaft 55, and the adsorption surface of the large-surface suction cup is aligned with the large surface of the square lithium battery, which is used to horizontally rotate the square lithium battery 180°.

[0039] The horizontal driving assembly includes an X-guide rail 32, a slider 33, a vertical pad 34 and a cylinder 391. The X-guide rail 32 is divided into two groups, which are parallel to each other and horizontally laid on the surface of the vertical sliding plate 31. The X-guide rail 32 is arranged in the horizontal direction perpendicular to the axial direction of the linear module 2; the slider 33 is divided into two groups, two in each group, and each group of the sliders 33 is slidably installed on a corresponding group of the X-guide rails 32; the vertical pad 34 is installed above each group of the sliders 33; the cylinder 391 is installed on the vertical sliding plate 31 and is located between the X-guide rails 32. The telescopic end of the cylinder 391 is connected to the slider 33 to drive the slider to slide axially along the X-guide rail. When the cylinder 391 is in motion, it pushes the vertical slide plate 31 to move, thereby driving the camera 390 of the vertical edge detection assembly 3 to move in the X-axis direction.

[0040] The detection camera assembly includes a camera mounting horizontal plate 35, a camera mounting vertical plate 36, reinforcing ribs 37, a camera support plate 38, a camera protection bracket 39 and a camera 390, wherein the camera mounting horizontal plate 35 is mounted on the vertical edge pad 34; the camera mounting vertical plate 36 is mounted on the camera mounting horizontal plate 35; the reinforcing ribs 37 are arranged and installed between the camera mounting horizontal plate 35 and the camera mounting vertical plate 36; the camera support plate 38 has two groups, which are installed and connected to the outer side of the camera mounting vertical plate 36, and the camera 390 is installed thereon; the camera protection bracket 39 has two groups, which are arranged above the camera 390 to protect the camera 390.

[0041] The upper surface of the large-surface suction cup 56 is in a "concave" shape, and a large-surface buffer pad 57 is provided in the middle of the "concave" shape. Four suction cups are provided at both ends of the "concave" shape. The large-surface suction cup and the large-surface buffer pad are used to support the large surface of the square lithium battery.

[0042] The battery clamp assembly 44 has two groups, which are respectively installed on the support plate 42, including a battery clamp 441, a clamping cylinder 442, a battery base plate 443 and a nylon baffle 444. The battery clamp 441 is an L-shaped structure, and the battery clamp 441 is a group of two. The battery clamp 441 is installed on the clamping cylinder 442 through a connecting slider, and the clamping cylinder 442 is installed on the battery base plate 443. The battery base plate 443 is installed and connected to the outside of the support plate 42 and the support rib plate 43. There are four nylon baffles 444, which are arranged at the horizontal end of the L-shaped structure to clamp the square lithium battery.

[0043] It also includes a control device, the signal output end of the control device is electrically connected to the control ends of the Y-axis drive device, the clamping cylinder and the reducer respectively, and the data input end of the control device is electrically connected or signal-connected to the signal input end of the camera.

[0044] Embodiment 2 A defect detection method using a square lithium battery vertical edge appearance defect detection device according to the present invention comprises the following steps:

[0045] (1) The square lithium battery is loaded by the loading robot to the middle position between the large-surface suction cup 56 and the large-surface buffer pad 57, and the two ends of the square lithium battery are fixed by the battery clamp assembly 44;

[0046] (2) After the square lithium battery is in place, the vertical edge detection component 3 moves in the Y direction through the action of the linear module 2, and then uses the camera 390 to take pictures and scan the defects of the two vertical edges of the square lithium battery;

[0047] (3) After the two vertical edges are inspected, the square lithium battery is turned 180 degrees under the action of the turntable assembly, and then the other two vertical edge defects of the square lithium battery are photographed and scanned by the camera 390;

[0048] (4) When the square lithium battery is changed to a new model, the distance between the camera of the vertical edge detection component and the square lithium battery is adjusted to be compatible with the appearance defect detection of square lithium batteries of different models.

[0049] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A device for detecting appearance defects of vertical edges of square lithium batteries, characterized in that: include: A support plate group, comprising a first support plate and a second support plate, wherein the first support plate and the second support plate are arranged side by side at the same height; A linear module is mounted between the first support plate and the second support plate, and the axial direction of the linear module is in the Y direction, comprising a Y-guide rail assembly and a Y-direction slider, the two ends of the Y-guide rail assembly are respectively mounted on the first support plate and the second support plate, and the Y-guide rail assembly has a built-in Y-direction driving device; the Y-direction slider is slidably mounted on the Y-guide rail, and the Y-direction slider is connected to the Y-direction driving device, and is used to drive the vertical edge detection assembly to slide along the axial direction of the linear module; A vertical edge appearance defect detection device is arranged on the Y-direction slider of the linear module, and comprises a vertical edge sliding plate, a horizontal driving component and a detection camera component. The vertical edge sliding plate is installed on the Y-direction slider of the linear module; the bottom of the horizontal driving component is slidably installed on the X-direction guide rail of the vertical edge sliding plate, and the upper part of the horizontal driving component is installed with a detection camera component for detecting whether the vertical edge appearance of the square lithium battery has defects; A battery base assembly is arranged between the first support plate and the second support plate, and comprises a support column, a support plate, a support rib plate and a battery clamp assembly. The support plate is installed between the first support plate and the second support plate through the support column and is located on one side of the linear module for installing the battery clamp assembly; the support rib plate is installed on the outer side of the support plate for supporting the support plate; the battery clamp assembly is installed on the support plate for clamping the square lithium battery; And a turntable assembly, which is arranged on the upper and lower surfaces of the support plate, including a reducer, a rotating wheel, a mounting shaft, a rotating shaft and a large-surface suction cup, the reducer is installed on the lower surface of the support plate through a base, and the front end of the reducer is connected to the rotating wheel; the rotating wheel is divided into two groups, and the two groups of rotating wheels are respectively connected by a first synchronous belt, a second synchronous belt and the corresponding mounting shaft belt, the large-surface suction cup is installed on the top of the mounting shaft, and the adsorption surface of the large-surface suction cup is aligned with the large surface of the square lithium battery, which is used to rotate the square lithium battery horizontally 180°.

2. A device for detecting vertical defects of a square lithium battery according to claim 1, characterized in that: The horizontal drive assembly includes an X-guide rail, a slider, a vertical pad and a cylinder. The X-guide rail is divided into two groups, which are parallel to each other and horizontally laid on the surface of the vertical sliding plate. The X-guide rail is arranged in the horizontal direction perpendicular to the axial direction of the linear module; the slider is divided into two groups, and each group of sliders is slidably installed on a corresponding group of X-guide rails; the vertical pad is installed above each group of sliders; the cylinder is installed on the vertical sliding plate and is located between the X-guide rails. The telescopic end of the cylinder is connected to the slider for driving the slider to slide axially along the X-guide rail.

3. A device for detecting vertical side appearance defects of a square lithium battery as claimed in claim 2, characterized in that: The detection camera assembly includes a camera mounting horizontal plate, a camera mounting vertical plate, reinforcing ribs, a camera support plate, a camera protection bracket and a camera, wherein the camera mounting horizontal plate is mounted on the vertical edge pad; the camera mounting vertical plate is mounted on the camera mounting horizontal plate; the reinforcing ribs are arranged between the camera mounting horizontal plate and the camera mounting vertical plate; there are two groups of camera support plates, which are installed and connected to the outer side of the camera mounting vertical plate, and the camera is installed thereon; there are two groups of camera protection brackets, which are arranged above the camera for protecting the camera.

4. A device for detecting vertical defects of a square lithium battery as claimed in claim 3, characterized in that: The upper surface of the large-surface suction cup is in a "concave" shape, a large-surface buffer pad is provided in the middle of the "concave" shape, and four suction cups are provided at both ends of the "concave" shape. The large-surface suction cup and the large-surface buffer pad are used to support the large surface of the square lithium battery.

5. A device for detecting vertical defects of a square lithium battery as claimed in claim 4, characterized in that: The battery clamp assembly has two groups, which are respectively installed on the support plate, including battery clamps, clamping cylinders, battery base plates and nylon baffles. The battery clamps are L-shaped structures, and the battery clamps are grouped in pairs. The battery clamps are connected to the clamping cylinders through connecting sliders, and the clamping cylinders are installed on the battery base plate. The battery base plate is installed and connected to the support plate and the outer sides of the support ribs. There are four nylon baffles, which are arranged at the horizontal ends of the L-shaped structure to clamp the square lithium batteries.

6. A device for detecting vertical defects of a square lithium battery as claimed in claim 5, characterized in that: It also includes a control device, the signal output end of the control device is electrically connected to the control ends of the Y-axis drive device, the clamping cylinder and the reducer respectively, and the data input end of the control device is electrically connected or signal-connected to the signal input end of the camera.

7. A defect detection method using the device for detecting vertical side appearance defects of a square lithium battery according to claim 6, characterized in that: The following steps are involved: (1) The square lithium battery is loaded to the middle position between the large-surface suction cup and the large-surface buffer pad by a loading robot, and both ends of the square lithium battery are fixed by the battery clamp assembly; (2) After the square lithium battery is in place, the vertical edge detection component moves in the Y direction through the action of the linear module, and then uses the camera to take pictures and scan the defects of the two vertical edges of the square lithium battery; (3) After the two vertical edges are inspected, the square lithium battery is flipped 180° by the turntable assembly, and then the other two vertical edges of the square lithium battery are photographed and scanned by the camera; (4) When the square lithium battery is changed to a new model, the distance between the camera of the vertical edge detection component and the square lithium battery is adjusted to be compatible with the appearance defect detection of square lithium batteries of different models.

Images